Alright so I just installed my new beautiful MAC H-pipe 2 days ago, and yesterday I hear this rattling.... it's a very high-pitched and fast rattle, like a thin piece of metal, maybe some sort of flange... and it's coming from around the starter. I plan to take a flashlight to it while someones revving the engine... but I was wondering if anyone could know offhand what this could be to save me some time and angry neighbors